Double jacquard control system of warp knitting machine based on dual bus architecture

In order to solve the problem, too long static data loading time and too slow dynamic data refreshing leading to the inconvenience of pattern change and reduction of speed in the double jacquard warp knitting machine production due to the quick increase in the jacquard comb number and pattern information. A system based on two levels of databus architecture and modular of jacquard control unit of the double jacquard warp knitting jacquard control system was built. 100 Mbps Ethernet was used for big chunks of the pattern file loading, and the double thread scheduling to balance the contradiction between the high-speed flow and low speed storage for the large amount of data was designed. Double data buffer to exchange space for time was adopted to realize the isolation and concurrent execution between the bus data transmission and jacquard action. The conflict between high real-time capability demand and large amount of pattern data transmission effectively was alleviated. By the production verification on the RDJ6/2 double needle warp knitting machine, the designed double jacquard control system can meet the production speed of no lower than 450 r/min, and increases the production speed by nearly 30%. The 1 000-row double-jacquard pattern file loading time is about 10 s, meaning that the loading speed increases by 120 times. Copyright No content may be reproduced or abridged without authorization.